[You will get]: 12 pieces trimmer spools and 4 pieces trimmer caps, total 16 pieces, enough quantity for your use and replacement. Suitable for models: replacement spools for grass trimmers. Suitable for WG150, WG151, WG151.5, WG152, WG153, WG154, WG155, WG155.5, WG156, WG157, WG160, WG160.1, W. G160. 2,WG163,WG165,WG175,WG180 Line Trimmer Spool Model:WA0010 Bobbin Cap Cover Model:WA0010 Flexible and durable: the thread impresses with its robustness and stability and lasts up to 25 percent longer than comparable threads under normal conditions. [Material]: plastic spool and caps as well as durable polyamide nylon thread, flexible and durable; use centrifugal force and aerodynamics to reduce air resistance and achieve fast cutting. [SPOOL SPECIFICATION]:10ft spiral nylon copolymer resin and synthetic trimmer/edge cutting line for Worx original spool models WA0010. The portable cord with a diameter of 1.65 mm supports fast cutting and a longer service life.